The purpose of the magnanimous is to be found in procuring benefits for the world and eliminating its calamities. … Mutual attacks among states, mutual usurpation among houses, mutual injuries among individuals; the lack of grace and loyalty between ruler and ruled, the lack of affection and filial piety between father and son, the lack of harmony between elder and younger brothers — these are the major calamities in the world.

Book 4; Universal Love II - Mozi